Not possible to see everything from the picture.
Forget the ac output for now. You need the dc armature connected in parallel with the fields for it to self excite and you must turn it in the correct direction.
I am not sure about the field connections, it looks as they can be connected series or parallel but I really can't see from the picture.
You say it will motor, if the field is properly connected it will motor in the same direction as you need to turn it to excite and you will have to turn it a bit faster than it motors.
You can easily fool yourself with this as it will still motor without the fields connected at all if the brushes are slightly off the neutral axis. It will also motor if you have connected the fields wrongly and have them in series with the armature but it won't generate in this state.
If the fields are properly connected for shunt operation you should get a residual voltage as you turn it , when you connect the shunt field the residual will drop a little as you load the armature if you are below critical speed. If above critical speed it will build up excitation.
It looks to have 4 field coils and I would expect these to be connected in series, but series parallel is possible.
When you have found the field leads for the 4 coils in series then try your battery across the field leads and the armature dc output should then rise way above the residual. If this works ok then the fields are probably right. Connect them is parallel with the armature and apply the battery and it should motor. Crank it in the direction in which it motors and it should build up when you are fast enough.
So much easier with the device in front of me that trying to explain by telepathy but I hope you can follow the argument.
Flux
